Double concave lens (SC-04)
Diameter Available 3mm--120mm
Diameter Tolerance +0/-0.5mm
Thickness Tolerance +/-0.05mm
Focal Length Tolerance +/-1%
Surface Accuracy ?/4 irregularity AT 632.8nm
Surface Quality 40-20 S/D
Centration less than 3 arc min
Clear Aperture m... - Update: 2013-05-08